产品描述
01 Type Dynamic speaker 02 Dimension External diameter 66 mm 03 Rated Input Power 1 W 04 Impedance 8 ohm ± 15% at 2KHz 05 Resonance Frequency (Fo) 450K Hz ± 20% at Fo, 1V 06 Sensitivity (S.P.L.) 98dB(0.5W/0.1m) ± 3 dB at AVE 0.8K,1.0K,1.2K,1.5K(Hz). 07 Frequency Range Fo – 4KHz 08 Distortion Less than 10 % at 2000Hz 1W 09 Max. Input Power Must be normal at 1.5W white noise for 1 minute. 10 Voice Coil Diameter 13.4 mm 11 Magnet Rare earth permanent (Nd-Fe-B) magnet Φ12.5 x 2mm 12 Weight 45g ± 0.2g 13 Appearance Should not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc. 14 Operation Test Must be normal at program source 1W 15 Buzz, Rattle, etc. Should not be audible at 2.83V sine Wave between Fo to 4KHz 16 Polarity When positive voltage is applied to the terminal marked (+), diaphragm should move to the front. 17 Terminal Strength Capable of withstand 1kg load for 30 seconds without resulting in any damage or rejection. 18 Load Test 1W white noise is applied for 96 hours and satisfy the test listed on item 05,06,13,15 19 High Temp. Test Keep 96 hours at +70℃±3℃ and leave 3 hours in normal temperature and then check 20 Low Temp. Test Keep 96 hours at -20℃±3℃ and leave 3 hours in normal temperature and then check 21 Humidity Test Keep 96 hours at + 60℃±3℃ relative humidity 95% and leave 3 hours in normal temperature and then checked. 22 Drop Test Drop the speakers contained in normal box onto the board 20mm thick 10 times from the height of 0.75m and then should satisfy the test listed on item 13 and 15 P 3/4 Measurement Condition Test and measurement will be carried out under normal condition of temperature within 5℃to 35℃,relative humidity within 45% to 85% and air pressure of 860mbar to 1060mbar. Should uncertainly arise in data obtained from the above atmosphere, control of temperature At 20℃±2℃ and relative humidity within 60% and 70%, with air pressure remaining unchanged, To be enforced. 1.Microphone : B&K 4191 2.Standard Baffle : In IEC 268-5 Where 1350mm x 1650mm 3.Testing Distance : 0.1m 4.Zero Level : -dB 5.Mode : SPEAKER 6.Input Power : 1W 7.potentiometer Range : 50dB 8.Sweep Time : 0.5sec
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